On Memorial Day (May 28), the Stranger Things favorite posted an adorable snapshot with her and her 15-year-old pop star beau on Instagram, and let's just say it totally proved our suspicions of their teenage romance.

Instagram (@milliebobbybrown)

“I’m alright, but even better w u,” Brown inscribed the sweet, shoreside picture of Sartorius giving her a piggyback ride.

In the photo, the 14-year-old star wears distressed jeans a top bun as the "Sweatshirt" crooner sports cargo pants and a blue shirt as he carries his girlfriend on his back along the seashore.

Instagram (@milliebobbybrown)

The Kodak moment comes just a day after the couple posted matching photos of the stars sharing a kiss under the moon on Sunday (May 27). Strangely, though, both Brown and Sartorius have since deleted the romantic memory (below) from their Instagram feed.

"Moonlight w him," the English model captioned the since-removed image, to which a nosy Ariana Grande, who was hiding in the comments, wrote: "I wasn't even allowed to leave my house til I was 20."

Instagram via Screenshot

While we don't know what inspired the twosome to erase the snapshots, we doubt it was as a result of Grande's harmless teasing.

The young stars have apparently been involved as early as January when fans caught them swapping "Likes" with one another on Instagram. "Thanks for the bear," Brown captioned a cute photo with a teddy bear gifted to her by Sartorius, who then replied, "Course."